Florence kroeber



(No Model.)

BKROBBER. METHOD 0F GOATING CLOCK GASES.

No. 500,050. Patented ont. s, i803.

5m .C d e W/TNESSES: y

/I-/ ATTORNEYS.

UNITED STATES FLORENCE KRCEBER,

PATENT OFFICE.

OF NEW YORK, N. Y.

METHOD OF COATING CLOCPtS-CASES.

SPECIFICATION forming part of Letters Patent No. 506,050, dated October 3, 1893.

Application ned february 15, 189s.

To all whom it may concern:

Be it known that I, FLORENCE KRCEBER, a resident of the city, county, and State of New York, have invented an Improvement in Clock-Cases, of which the following is a specification.

- My invention relates more especially to clock cases.

The main object of the invention is to provide an improved method of coating such cases, and of giving them the desired color.

The invention consists in the method and in the product or article hereinafter described and set forth in the claims.

In the drawing the gure shows a section of a piece of the clock case with several layers of coating material thereon according to this invention, and shown largely magnied in thickness.

By my invention I am able to coat clock cases with a film of coloring n1aterial,-here inafter called enamel-like material, since it is applied and then subjected to heat, giving it a glazed or enamel-like appearance,in such manner as to give a line imitation of por-l celain, and one in which the film is not liable to fracture and peel off. i

The clock case has a body a, preferably of iron, and the outer surface b is carefully pol ished by any suitable means. On said surface is placed a coating c of said enamel-like material, which is then subjected to moderate heat, whereby it is fixed on the surface. The heat to which the article is subjected to x the enamel -like material is just high enough to render the coat viscid, but not high enough to render it hard and unworkable. I have found that a temperature of 120Fah'renheit, or thereabouts, is sufficient to produce this result. This coating is then rubbed down while in a viscid condition with pumice stone and hot Water, or other similar polishing substances, by which all roughnesses are, removed and a very thin even coating is left on the polished iron. Over coating c is placed a similar coating d, which is then also subjected to the same degree of heat and polished or rubbed down considerably While yet viscid in the manner above indicated. The layers c CZ are preferably not colored, and the number of these layers may be varied. Over layer d is placed a layer e, which should con- Serial No. 462,414. (No specimens.)

tain a suitable coloring material to form a foundation for subsequently applied layers, and Whichis also subjected to heat, and then, preferably polished. Over this layer is placed one layer or more of enamel-like material f, having the desired color, such as cream white, red, pink, green or blue. These layers are each subjected to heat, but are preferably notpolished. The several coatings, or some of them, and especially the last one, should have in them or in it a varnish capable of standing the heat to which the coating is subjected, and which will give a fine gloss or porcelain appearance to the surface. The number of the colored coatings applied may also be varied. 1

Sometimes the polishing of the surface to be coated may be omitted, but this will generally require more layers and more polishing of the'coating material.

In practice I use an enamel-like material for the first layers composed of a mixture of oxide of zinc, oxide of lead and Iiatting, or any suitable varnish, and for the last layers I have used flatting or any suitable varnish with coloring material to produce either color mentioned, and have subjected each layer to a temperature of about 120o Fahrenheit. This not only dries the layers quickly, but gives a better glaze to the surface.

As above indicated the coating applied as described is very permanent, and has the exact appearance of porcelain.

Having now described my invention, I

claiml. The method of coating clock cases which consists in applying several coats of enamellike material, heating the article after each coat has been applied to a degree of temperature sucient to render the coat viscid, and rubbing down each coat separately while in the viscid condition, whereby all roughnesses are removed and a thin even coating is left .on the clock case, substantially as and in the manner specified.

2. The method of coating clock cases which consists in applying to the article one or more coats of enamellike material, heating the same after each coat has been applied to a degree of temperature sufficient to render the coat viscid, and separately nishing each coat by rubbing down while viscid, then applylng IOO one or more coats of enamel-like material with coloring matter added and heating after each coat to the same degree of temperature as before, then applying one or more coats of the last; named material mixed with varnish, and heating the article after each of said coats has been applied, substantially as and in the manner specified.

3. The method of coating clo kcases which consists in applying to the artic e one or more coats of enamel-like material consisting of oxide of zinc and oxide of lead mixed with varnish, heating the same after each coat has been applied to a degree sufficient to render the coat viscid, and separately finishing each coal;V by rubbing down, then applying one or more coats of varnish with coloring material embodied therein and heating after each of these coats has been applied, substantially as and in the manner specified.

FLORENCE KROEBER. Witnesses: O. BARTEL,

G. FoLKE. 

